Jets and Jacksonville look to be about the most pathetic in terms of "square footage owned". I'm surprised more of western Connecticut and parts of Vermont aren't Giants country, but the border for the New England states holds pretty firm for the Pats, other than the southwestern-most corner of Connecticut.

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"I love signature blocks on the Internet. I get to put whatever the hell I want in quotes, pick a pretend author, and bang, it's like he really said it." George Washington

My guess is a big issue with this is sample size. In order for someone to be included in this, they have to 1) have internet access, 2) have a Facebook account, and 3) be motivated enough to "like" a team on there. I'd bet that's worth less than 1% of the population.

That's fine in big counties, but in a small county with only a couple thousand people, you'd only have 20 people in your sample. With that few people, you're going to get some weird effects.